public class Point { private double x; private double y;

public Point() { }

public Point(double x, double y) { this.x = x; this.y = y; }

public double distance(Point p) { return Math.sqrt((this.x - p.x) * (this.x - p.x) + (this.y - p.y) * (this.y - p.y)); }

public double getX() { return x; }

public double getY() { return y; } }